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Sound is a sequence of waves of pressure which propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). During their propagation, waves can be reflected, refracted, or attenuated by the medium. The purpose of this experiment is to examine what effect the characteristics of the medium have on sound.
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The type of waves for the propagation of sound in air is longitudinal. Longitudinal waves are characterized by the vibration of particles in the same direction as the wave's propagation. In the case of sound waves, air molecules move back and forth in the direction of the sound wave as it travels through the air.
Back and forth in the direction of propagation of the sound waves.
Adiabatic compression & rarefaction.
Sound is a sequence of waves of pressure which propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). During their propagation, waves can be reflected, refracted, or attenuated by the medium. The purpose of this experiment is to examine what effect the characteristics of the medium have on sound.
Different is the speed of propagation. Scroll down to related links and look at "Acoustic or sound waves in air - Radio and light waves in a vacuum".
Propagation of sound in a medium (like the atmosphere) is the collision between the medium particles driven by a vibrating object
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Sound power level is equal to sound pressure level and intensity level at a distance of r = 0.2821 m from the source at full sphere propagation. See related Link.
Acoustics.
Propagation means "movement through" something in this context. You can study the propagation of sound through air, for example, the most common kind of sound there is for people. Sound propagates through water as well, as you can easily prove by taking a dip in the pool. Does sound propagate through a vacuum? Does it propagate through other materials? These are testable questions.
Loudness: Sound power is the cause, but sound pressure makes the effect. Scroll down to related links and look at "Sound pressure and sound power - Effect and cause".
Propagation.
Acoustics.
Frequency and speed of propagation of the wave are independent of one another. The medium determines the speed of propagation.
The act of propagating; continuance or multiplication of the kind by generation or successive production; as, the propagation of animals or plants., The spreading abroad, or extension, of anything; diffusion; dissemination; as, the propagation of sound; the propagation of the gospel.